I cant create an inset on the face of an extrude
It appears that you have duplicate vertices in the area you are trying to extrude. Try Mesh&gt;Clean-Up&gt;Merge by Distance, then adjust the merge distance to get a good result. After this, to aid in the help of extruding and beveling, switch to object mode, then press CTRL+A and select Scale to apply scale. Now select that face in edit mode and try inserting face again. It should work.